双金属片
纳米材料基催化剂
钴
催化作用
铂金
纳米颗粒
乙醇
电化学
傅里叶变换红外光谱
化学
化学工程
密度泛函理论
材料科学
纳米技术
无机化学
有机化学
电极
物理化学
冶金
计算化学
工程类
作者
Binwei Zhang,Tian Sheng,Yunxiao Wang,Ximing Qu,Junming Zhang,Zong-Cheng Zhang,Hong‐Gang Liao,Fuchun Zhu,Shi Xue Dou,Yanxia Jiang,Shi‐Gang Sun
标识
DOI:10.1021/acscatal.6b03021
摘要
In order to maximize the Pt utilization in catalysts and improve catalytic processes, we report a convenient strategy for preparation of Pt3Co with Pt-skin structured bimetallic nanocatalysts directly supported on porous graphitic carbon. Notably, the thickness of the Pt-skin is only 1–2 atomic layers, about 0.5 nm. Surprisingly, the bimetallic nanocatalysts composed of Pt3Co with Pt-skin are first used as ethanol electro-catalysts, with the mass activity of 0.79 mA μgPt–1, which is a 250% enhancement compared with commercial Pt/C (0.32 mA μgPt–1). On the basis of the results of electrochemical in situ Fourier transform infrared spectroscopy (FTIRS) and density functional theory (DFT), a new ethanol electro-oxidation enhancement mechanism is proposed in which Pt3Co with Pt-skin promotes partial oxidation of ethanol over C–C bond cleavage, thereby resulting in higher CH3COOH production than CO2 production.
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